United States v. Green , 698 F.3d 48 ( 2012 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 11-2157
    UNITED STATES OF AMERICA,
    Appellee,
    v.
    JUSTIN GREEN,
    Defendant, Appellant.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. George A. O’Toole, U.S. District Judge]
    Before
    Howard, Stahl, and Lipez,
    Circuit Judges.
    Fred Haddad for appellant.
    Linda M. Ricci, Assistant United States Attorney, with whom
    Carmen M. Ortiz, United States Attorney, was on brief for appellee.
    October 31, 2012
    STAHL,    Circuit      Judge.      A   jury    convicted        defendant-
    appellant    Justin      Green      of   participating          in     an   oxycodone
    distribution conspiracy, and he received a sentence of 210 months.
    On appeal, he raises several challenges to his conviction and
    sentence, the most important of which is that the district court
    erred in refusing to suppress evidence that Drug Enforcement
    Administration       (DEA)    agents     obtained      from     Green’s      cellular
    telephone, without a warrant, two weeks after they seized the
    phone. We find that any error was harmless and therefore leave for
    another day the question of whether the agents’ activity was lawful
    under the Fourth Amendment. Because Green’s other claims also lack
    merit, we affirm.
    I. Facts & Background
    Given that this appeal follows a conviction, we recount
    the facts in the light most favorable to the verdict.                          United
    States v. Poulin, 
    631 F.3d 17
    , 18 (1st Cir. 2011).
    In the fall of 2008, the DEA began investigating a
    suspected oxycodone trafficking operation in and around Fall River,
    Massachusetts.       With the help of a cooperating witness, the DEA
    identified Gilberto Aguiar as one of the participants and received
    court    authorization       to   intercept    calls      and   text    messages   on
    Aguiar’s cell phone, as well as on the phones of Aguiar’s suspected
    supplier, Dimas Almeida, and Almeida’s suspected supplier, Aaron
    Tripp.    The DEA agents intercepted calls between Tripp and a man
    -2-
    named Mark Carrolton, which revealed that Tripp was planning to
    travel to Florida to buy several hundred thousand dollars’ worth of
    pills.    Carrolton arranged for an individual named “J” or “Justin”
    (later identified as the defendant, Justin Green) to supply Tripp
    with 30,000 30-milligram oxycodone pills and 2,500 80-milligram
    pills.    Carrolton also arranged for a second supplier named “Twin”
    to provide Tripp with 500 80-milligram oxycodone pills.
    Tripp’s trip to Florida was delayed for a week or so, and
    on May 1, 2009, Carrolton received a text message from Green
    stating the following: “I cant [sic] hold these for any longer.   My
    people are backed up and jumping down my throat.   Im [sic] going to
    have [sic] get rid of them to someone else if he isnt [sic] @erious
    [sic].”    Carrolton forwarded that message to Tripp, warning Tripp
    that he could not “buy much more time” and telling him to read the
    forwarded message from “J.”    During a conversation with Tripp that
    same day, Carrolton confirmed that Tripp was bringing enough cash
    (at least $300,000 or $350,000) to Florida for the transaction and,
    at the end of the conversation, told Tripp that he was “going to
    call Justin right now.”      Carrolton then immediately placed six
    calls to Green’s cell phone number.
    On May 5, 2009, on his way down to Florida, Tripp was
    pulled over by local law enforcement officers in South Carolina,
    who seized $396,000 in cash from Tripp as part of a search of his
    vehicle.    Later that day, the DEA agents intercepted a call from
    -3-
    Tripp to Carrolton, in which Tripp reported what had happened and
    told Carrolton to “ditch” his phone.              Carrolton responded that he
    would “call ‘J’” and talk to Tripp later.                   Carrolton then made
    three attempts to reach Green’s cell phone number.                  Carrolton also
    sent a text message to the same number that night.
    On    May   6,    2009,    the   DEA   agents persuaded        Tripp to
    cooperate with them.           At the agents’ direction, Tripp placed
    several (recorded) calls to Carrolton and told Carrolton that he
    would   return   to    Massachusetts        for   more    money    and   then     meet
    Carrolton and Green in Florida to complete the transaction as
    planned.
    On May 7, 2009, at approximately 7:30 p.m., Tripp once
    again called Carrolton, to finalize the plans for the drug deal.
    Shortly thereafter, Carrolton and Green arrived at a Holiday Inn
    Express in Fort Lauderdale, where the DEA agents had arranged for
    Tripp to rent a room.           When Carrolton and Green (who arrived
    separately) knocked on Tripp’s hotel room door, the DEA agents
    opened the door and identified themselves.                   Green ran down the
    hallway, but the agents stopped him and arrested him.                    The agents
    also arrested Carrolton.
    At the time of the arrests, the DEA agents seized a cell
    phone, backpack, and two bags of pills from Carrolton (containing
    748 30-milligram oxycodone pills and 442 80-milligram oxycodone
    pills).    Carrolton        later    testified    at     trial    that   “Twin”    had
    -4-
    supplied some of those pills and that the rest were from Green.
    The agents also seized two cell phones from Green: a black MetroPCS
    Samsung phone and a Blackberry device.
    Two weeks after Green’s arrest, on May 21, 2009, DEA
    Special Agent Carl Rideout, by then back in Massachusetts, removed
    the back outside casing and battery from each of Green’s cell
    phones and retrieved the International Mobile Subscriber Identity
    (IMSI) number from each.1      Agent Rideout did not have a warrant.
    According to the government, the “DEA agents used the IMSI numbers
    to obtain toll and subscriber information (including the telephone
    numbers) for the cellular telephones.         Agents learned, among other
    things, that the telephone number associated with Green’s MetroPCS
    black Samsung cellular telephone was (954) 245-2759.”
    In June 2009, Green, Carrolton, Tripp, and others were
    charged with conspiring to possess with intent to distribute and to
    distribute   oxycodone,   a   Schedule   II    controlled    substance,   in
    violation of 21 U.S.C. § 846.       On March 31, 2010, Green filed a
    motion to suppress the cell phones and all evidence obtained from
    them, and on October 15, 2010, the district court heard oral
    argument on that motion.      Shortly thereafter, on November 1, 2010,
    Agent    Rideout   obtained   consent    from    Carrolton    to   activate
    1
    The district court described an IMSI number as a “unique
    identifying number[] assigned to the computer chip[] installed on”
    a cell phone. United States v. Green, No. 09–10183–GAO, 
    2011 WL 86681
    , at *2 (D. Mass. Jan. 11, 2011). The number is also printed
    on the inside of the phone itself.
    -5-
    Carrolton’s cell phone (seized from him at the scene) and retrieve
    Green’s number from the phone’s electronic address book, listed
    under the name “JSTN.”    That number matched the one that the DEA
    had obtained using Green’s IMSI number.             That same day, the
    government filed a supplemental response to Green’s motion to
    suppress, arguing that the “inevitable discovery” doctrine applied,
    see Nix v. Williams, 
    467 U.S. 431
    , 446–47 (1984), because the DEA
    would have obtained Green’s phone number through the consensual
    search of Carrolton’s phone and then, using that number, would have
    subpoenaed   Green’s   toll   records.2     On   January   11,   2011,   the
    district court denied Green’s motion to suppress, finding that the
    retrieval of his IMSI number did not constitute a “search” within
    the meaning of the Fourth Amendment.        See United States v. Green,
    No. 09–10183–GAO, 
    2011 WL 86681
    , at *3-4 (D. Mass. Jan. 11, 2011).
    At trial, Carrolton and Tripp testified against Green, as
    did a man named William Conda, who had obtained oxycodone from
    Green in the past and who introduced Green to Carrolton.           After a
    four-day trial, the jury convicted Green.            The district court
    imposed a below-guideline sentence of 210 months in prison and
    three years of supervised release.        This appeal followed.
    2
    Toll records, which a telephone company compiles, detail,
    among other things, the phone numbers a subscriber has called and
    received calls from in a given month.
    -6-
    II. Analysis
    Green raises four claims on appeal.            First, he argues
    that the district court should have granted his motion to suppress,
    because the DEA agents’ retrieval of his IMSI number from his cell
    phone constituted a Fourth Amendment search.           Second, he contends
    that the district court violated Federal Rules of Evidence 403 and
    404(b) by admitting the testimony of William Conda, because Conda
    discussed Green’s prior bad acts that fell outside the time period
    of the charged conspiracy. Third, Green challenges the sufficiency
    of the evidence against him.          Fourth, he urges us to find clear
    error in the district court’s drug quantity calculation.                  We
    address each claim in turn.
    A.   The motion to suppress
    In the typical case in which a defendant challenges the
    denial of a motion to suppress, we review the district court’s
    factual findings for clear error and its legal conclusions de novo.
    United States v. Symonevich, 
    688 F.3d 12
    , 18 (1st Cir. 2012).
    Here,    however,   we   need   not   delve   into   the   district   court’s
    decision, because we find that there was ample evidence to convict
    Green even without the information that the DEA agents obtained
    from his cell phone after his arrest.3
    3
    Though Green argued in his brief on appeal that the DEA
    agents did not have probable cause to arrest him, and thus that his
    cell phones were not seized incident to a lawful arrest, he
    conceded at oral argument that what occurred on May 7, 2009 was
    indeed an arrest, supported by probable cause. See United States
    -7-
    The two cell phones seized from Green at the time of his
    arrest were a black MetroPCS Samsung phone and a BlackBerry device.
    Two weeks later, after returning to Massachusetts, Agent Rideout
    opened the back of each phone, removed the battery, and obtained
    each phone’s IMSI number.   The IMSI number of the Samsung phone was
    visible on the phone after the battery was removed, and the IMSI
    number of the Blackberry phone was on a card inserted into a slot
    where the battery had been. Because the government does not appear
    to have introduced any evidence at trial that it acquired using the
    Blackberry’s IMSI number, we focus on the retrieval of the IMSI
    number from the Samsung device.       The DEA agents used that IMSI
    number to determine that (954) 245-2759 was the phone number
    associated with the phone, to obtain Green’s toll records from
    MetroPCS, and to obtain what the government has described as other
    “subscriber information.”    The government’s brief does not make
    clear what that other subscriber information included, nor has
    either party provided us with the trial exhibit that might answer
    v. Robinson, 
    414 U.S. 218
    , 235 (1973) (“A custodial arrest of a
    suspect based on probable cause is a reasonable intrusion under the
    Fourth Amendment; that intrusion being lawful, a search incident to
    the arrest requires no additional justification.”). In any event,
    even if Green had not conceded the point, we would have found that
    the DEA agents relied on “reasonably trustworthy facts and
    circumstances” and had “information upon which a reasonably prudent
    person would believe the suspect had committed or was committing a
    crime” when they arrested Green. United States v. Young, 
    105 F.3d 1
    , 6 (1st Cir. 1997). The seizure of Green’s cell phones therefore
    did not violate the Fourth Amendment. See 
    Robinson, 414 U.S. at 235
    .
    -8-
    that       question.     When    asked,     at    oral   argument,   exactly      what
    information can be gleaned about a subscriber using his IMSI
    number, neither party was able to provide an answer.
    The question Green raises -- whether the DEA agents’
    retrieval of his IMSI number constituted a search within the
    meaning of the Fourth Amendment4 -- is not, in our view, an easy
    one.       It implicates an important and developing area of Fourth
    Amendment       law:    the   extent   of    the    privacy    interest    that     an
    individual has in his cell phone and cellular communications. See,
    e.g., United States v. Flores-Lopez, 
    670 F.3d 803
    (7th Cir. 2012);
    United States v. Finley, 
    477 F.3d 250
    , 258-60 (5th Cir. 2007); cf.
    United States v. Jones, 
    132 S. Ct. 945
    , 957 (2012) (Sotomayor, J.,
    concurring).       But we find this case to be the wrong vehicle for
    exploring       those    novel    issues,        both    because   the   record    is
    insufficiently developed and because, even assuming that a Fourth
    Amendment search occurred here, any error was harmless.
    4
    Green also argues that, if a Fourth Amendment search did
    occur here, it was not authorized by the search-incident-to-arrest
    exception, see 
    Robinson, 414 U.S. at 235
    , given the two-week delay
    between the seizure of his cell phone and the retrieval of his IMSI
    number. It is worth noting, however, that the government would
    bear the burden of invoking any exception to the warrant
    requirement, see Coolidge v. New Hampshire, 
    403 U.S. 443
    , 455
    (1971), and it has not argued in its brief on appeal that the
    search-incident-to-arrest exception applies here. The government
    claims only that the retrieval of Green’s IMSI number did not
    constitute a search, because an individual does not have a
    reasonable expectation of privacy either in his IMSI number, which
    is shared with the telephone company, or in the inside casing of
    his cell phone.    See Katz v. United States, 
    389 U.S. 347
    , 361
    (1967) (Harlan, J., concurring).
    -9-
    The admission of evidence obtained in violation of the
    Fourth Amendment is harmless if the government can “prove beyond a
    reasonable doubt that the error complained of did not contribute to
    the verdict obtained.”    Chapman v. California, 
    386 U.S. 18
    , 24
    (1967); see also United States v. Salimonu, 
    182 F.3d 63
    , 71 (1st
    Cir. 1999).     The government urges us to apply a more lenient
    standard, claiming that the improper admission of evidence is
    harmless if it is “highly probable that the error did not influence
    the verdict.”    United States v. Flores-de-Jesús, 
    569 F.3d 8
    , 27
    (1st Cir. 2009) (citation and internal quotation marks omitted).
    But, as we recently reiterated, “[t]here are two barometers for
    measuring harmless error in a criminal case,” and the stricter
    harmless-beyond-a-reasonable-doubt standard applies “to issues of
    constitutional dimension,” like the one presented here.      United
    States v. Sasso, 
    695 F.3d 25
    , 29 (1st Cir. 2012).   Despite the fact
    that the government has articulated the wrong standard, however, it
    has satisfied the correct one.
    The government maintains, and Green does not dispute,
    that if the district court had granted Green’s motion to suppress,
    the only evidence that would not have been admitted at trial was
    that the particular Samsung cell phone that the agents seized from
    him on May 7, 2009 was assigned telephone number (954) 245-2759.
    Though the DEA agents did also obtain Green’s toll records using
    his IMSI number, the government apparently did not use those
    -10-
    records at trial.    The government submitted a chart summarizing
    Carrolton’s telephone contacts with Green, but that chart was based
    entirely on Carrolton’s toll records, obtained with his consent.
    The other piece of evidence that the DEA agents obtained
    using Green’s IMSI number was that his telephone number was (954)
    245-2759, but that evidence would still have come in at trial,
    through   Carrolton’s   testimony   and   information   obtained   from
    Carrolton’s phone with his consent.5         Perhaps more importantly,
    Green stipulated at trial that (954) 245-2759 was “the mobile
    telephone number assigned to a telephone used by Justin Green.”
    Furthermore, there was a great deal of other evidence
    connecting Green to the conspiracy. That evidence, discussed above
    and at more length below, included the trial testimony of co-
    conspirators   Carrolton    and     Tripp,    the   intercepted    wire
    communications between and among Green’s co-conspirators, the fact
    that Green arrived at the Holiday Inn Express on May 7, 2009 for
    5
    This included Carrolton’s toll records and the fact that his
    cell phone address book listed number (954) 245-2759 under the name
    “JSTN.” The government suggests that the evidence obtained using
    Carrolton’s cell phone thus provided an “independent source” for
    the information contained in Green’s toll records, see Murray v.
    United States, 
    487 U.S. 533
    , 537 (1988), or that the DEA would have
    “inevitably discovered” those toll records by issuing a subpoena to
    MetroPCS once Carrolton gave the agents Green’s cell phone number,
    see 
    Nix, 467 U.S. at 446–47
    . However, the district court record
    indicates that the Samsung phone was a prepaid device and that the
    MetroPCS account did not reflect Green’s own name as the
    subscriber. Thus, as we understand it, only Green’s IMSI number
    allowed the government to definitively link Green to the specific
    Samsung phone seized from him on May 7, 2009.
    -11-
    the expected drug transaction, and the fact that Green fled when
    the DEA agents confronted him.
    We cannot imagine that the jury would have rendered a
    different verdict in the absence of the one, relatively minor,
    piece of evidence derived exclusively from the retrieval of Green’s
    IMSI number: namely, that the particular phone he was carrying on
    the day     he    was    arrested    was     assigned    telephone   number    (954)
    245-2759.        We therefore find beyond a reasonable doubt that any
    error here did not contribute to the verdict, see 
    Chapman, 386 U.S. at 24
    , and we leave the Fourth Amendment question for another day.
    B.    The testimony of William Conda
    Green’s second claim is that the district court should
    not have admitted the testimony of William Conda, who had prior
    drug dealings with Green leading up to Green’s participation in the
    conspiracy,       because      Conda’s     testimony     concerned    events   that
    occurred before the time period alleged in the indictment and thus
    implicated Green’s “prior bad acts” under Federal Rule of Evidence
    404(b).     Green also contends that the testimony was unfairly
    prejudicial.       See Fed. R. Evid. 403.         We review Green’s preserved
    evidentiary challenge for abuse of discretion.                    United States v.
    Mare, 
    668 F.3d 35
    , 38 (1st Cir. 2012).
    The indictment in this case alleged that the conspiracy
    to distribute oxycodone took place “[b]eginning on an unknown date
    but   at   least    by    in    or   about    October,    2008,    and   continuing
    -12-
    thereafter until in or about May, 2009.” Conda testified to events
    that seem to have occurred from October 2004 through 2006 or 2007,
    arguably      before      the   time   period    explicitly     alleged    in     the
    indictment.6        The essence of Conda’s testimony was that: a man
    named Bill introduced him to Green; Conda obtained oxycodone pills
    from Green; Conda met Carrolton through work in 2006 and began
    taking oxycodone pills with Carrolton after work; Conda acted as a
    middleman by obtaining pills for himself and Carrolton from Green;
    and Conda eventually introduced Carrolton to Green as his source
    for oxycodone.
    Under Rule 404(b), “[e]vidence of a crime, wrong, or
    other act is not admissible to prove a person’s character in order
    to   show    that    on    a    particular    occasion   the    person    acted    in
    accordance with the character,” but it “may be admissible for
    another purpose, such as proving motive, opportunity, intent,
    preparation, plan, knowledge, identity, absence of mistake, or lack
    of accident.”        Fed. R. Evid. 404(b).          “The prohibition against
    ‘other      acts’   evidence      typically     refers   to    evidence   that    is
    extrinsic to the crime charged and introduced for the purpose of
    showing propensity.”            United States v. Gobbi, 
    471 F.3d 302
    , 311
    (1st Cir. 2006).          The district court found that Conda’s testimony
    6
    We say “arguably” because the indictment did include the
    “[b]eginning on an unknown date” language, but the government has
    not invoked that language to argue that the acts about which Conda
    testified fell within the time frame of the indictment.
    -13-
    did not implicate Rule 404(b), because it was, in the court’s
    words, “evidence tending to establish the charged conspiracy.” See
    United States v. Villarman-Oviedo, 
    325 F.3d 1
    , 11 (1st Cir. 2003)
    (holding that where evidence is not of “other crimes, wrongs, or
    acts” but is intrinsic to the crime charged, “Rule 404(b) is really
    not implicated at all”).
    We can bypass the question of whether the “other acts” at
    issue here were intrinsic or extrinsic.             They were, in any event,
    admissible under Rule 404(b), so any error was harmless.                   We have
    repeatedly held that, in a conspiracy case, “evidence of other bad
    acts . . . can be admitted to explain the background, formation,
    and   development       of    the    illegal      relationship,        and,     more
    specifically,    to    help   the jury      understand    the    basis    for   the
    co-conspirators’ relationship of mutual trust.”                 United States v.
    Escobar-de Jesus, 
    187 F.3d 148
    , 169 (1st Cir. 1999) (internal
    citations omitted); see also United States v. Balthazard, 
    360 F.3d 309
    , 317-18 (1st Cir. 2004) (finding evidence of a drug transaction
    admissible     where    the   government        failed   to    prove     that   the
    transaction occurred during the time frame of the conspiracy,
    because   it   was     evidence     of   the    “background,     formation,     and
    development of the illegal relationship” (citation and internal
    quotation marks omitted)).           Green has articulated no reason why
    that rule should not apply to Conda’s testimony.
    -14-
    Even   if    evidence    is   admissible   under   Rule     404(b),
    however, the district court must exclude it “if its probative value
    is substantially outweighed” by a “danger of unfair prejudice.”
    Fed. R. Evid. 403; see also United States v. Varoudakis, 
    233 F.3d 113
    , 121 (1st Cir. 2000) (“Prior bad act evidence that surmounts
    the bar of Rule 404(b) may still be inadmissible under Rule 403.”).
    Green’s Rule 403 claim is that Conda’s testimony was unfairly
    prejudicial because it “paint[ed] [Green] as an oxycodone dealer,
    with such proclivities.”          But there was ample other evidence from
    which the jury could reasonably have concluded that Green was,
    indeed, an oxycodone dealer, and we thus fail to see how Conda’s
    testimony   had any      “undue    tendency   to   suggest   decision    on   an
    improper basis.”        Fed. R. Evid. 403 advisory committee’s note.
    This is not the kind of rare and “extraordinarily compelling” case
    in which we would “reverse a district court’s on-the-spot judgment
    concerning the relative weighing of probative value and unfair
    effect.”    United States v. Li, 
    206 F.3d 78
    , 84-85 (1st Cir. 2000)
    (citation and internal quotation marks omitted).               There was no
    abuse of discretion.       See 
    Mare, 668 F.3d at 38
    .
    C. The sufficiency of the evidence
    Green’s third claim is that the district court erred in
    denying his motion for judgment of acquittal.          See Fed. R. Crim. P.
    29.   He argues, as he did before the district court, that the
    evidence was insufficient to establish that he was a member of the
    -15-
    charged conspiracy and instead proved only that he was part of a
    buyer-seller relationship with Tripp and Carrolton.    He emphasizes
    that he was never captured on a wiretap or observed by law
    enforcement until the day of his arrest, that Tripp was unable to
    pick him out of a lineup, that he had no drugs on him when he
    arrived at the Holiday Inn Express, and that at least one other
    dealer, “Twin,” was supplying many of the oxycodone pills for the
    distribution conspiracy.    We review Green’s challenge to the
    sufficiency of the evidence de novo, considering that evidence in
    the light most favorable to the verdict.    
    Symonevich, 688 F.3d at 23
    .   “A reversal is warranted only where no rational factfinder
    could have concluded that the evidence presented at trial, together
    with all reasonable inferences, established each element of the
    crime beyond a reasonable doubt.”     
    Id. To support its
    conspiracy charge against Green, the
    government was required to prove beyond a reasonable doubt that:
    (1) a conspiracy existed; (2) Green knew of the conspiracy; and
    (3) Green voluntarily participated in the conspiracy.7       United
    States v. Díaz, 
    670 F.3d 332
    , 347 (1st Cir. 2012).    The government
    7
    In a curious footnote in its brief on appeal, the government
    incorrectly claims that it did not have to show that Green had
    knowledge of the existence of the conspiracy or that he voluntarily
    joined it. Those are two of the three fundamental elements of a
    conspiracy charge. See, e.g., United States v. Cortés-Cabán, 
    691 F.3d 1
    , 13 (1st Cir. 2012); 
    Symonevich, 688 F.3d at 23
    ; United
    States v. Díaz, 
    670 F.3d 332
    , 347 (1st Cir. 2012); United States v.
    Dellosantos, 
    649 F.3d 109
    , 116 (1st Cir. 2011).
    -16-
    could meet that burden with direct or circumstantial evidence. 
    Id. And while “knowledge
    of the broader conspiracy’s existence is
    critical,” the government did not have to prove that Green had
    “knowledge of every other participant, or of the details of the
    conspiracy.”   United States v. Franco-Santiago, 
    681 F.3d 1
    , 9 (1st
    Cir. 2012) (citations and internal quotation marks omitted).   The
    evidence against Green was more than sufficient; we recount just
    some of it here.
    First, Conda’s testimony detailed the formation of the
    conspiracy, describing how Carrolton met, and began obtaining
    oxycodone from, Green.
    Second, Tripp testified that, during the time period
    charged in the indictment, he repeatedly traveled from New England
    to Florida to obtain escalating amounts of oxycodone pills from
    Green.   Carrolton acted as the middle man, but Tripp met Green
    during those transactions and testified that he was aware that
    Green was the source of the oxycodone pills.   Tripp testified that
    Green supplied him with “a few hundred” pills of oxycodone at a
    time and that, overall, he purchased between 100,000 and 125,000
    pills from Green over the course of the conspiracy.     Tripp then
    sold about ninety-five percent of the pills to Dimas Almeida, who
    was involved in the drug trade in Massachusetts.
    Third, Carrolton testified that somewhere between ninety-
    five and ninety-eight percent of the pills that Tripp obtained
    -17-
    through Carrolton came from Green.       Those transactions occurred
    about a dozen times between early 2008 and May 2009.         Carrolton
    testified that Tripp would fly to Florida to obtain the pills when
    the deals involved less than $150,000, but on at least three
    occasions, Tripp purchased more than $150,000 worth of pills from
    Carrolton and Green and thus drove to Florida in order to be able
    to conceal the money.   According to Carrolton, Green set the price
    for the pills and was present for the majority of the transactions
    with Tripp.
    Fourth, Green arrived at the Holiday Inn Express on May
    7, 2009 for what Carrolton and Tripp testified was a planned drug
    transaction and fled when the DEA agents identified themselves.
    Carrolton’s toll records and the intercepted wire communications
    between   Green’s   co-conspirators   provided   further   evidence   of
    Green’s participation in the oxycodone distribution ring.
    We have held that “[t]he testimony of a single witness
    can be enough to support the government’s case, and even the
    uncorroborated testimony of an informant may suffice to establish
    the facts underlying a defendant’s conviction.”      United States v.
    Meises, 
    645 F.3d 5
    , 12 (1st Cir. 2011) (internal citations and
    quotation marks omitted).   There was obviously much more than that
    in this case.   Green cites United States v. Moran, 
    984 F.2d 1299
    (1st Cir. 1993), for the proposition that a mere buyer-seller
    relationship between himself, Tripp, and Carrolton was insufficient
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    to establish Green’s knowing and voluntary participation in the
    conspiracy.    But in Moran, we suggested that “[a] pattern of sales
    for   resale   between    the   same    persons,   together   with   details
    supplying a context for the relationship, might well support a
    finding of conspiracy,” and that is exactly what the evidence
    demonstrated here.       
    Id. at 1303; see
    also United States v. Rivera-
    Ruiz, 
    244 F.3d 263
    , 270 (1st Cir. 2001) (“[W]here advanced plans
    are made regarding the sale of narcotics in wholesale quantities,
    the participants in the transaction may be presumed to know that
    they are part of a broader conspiracy.” (quoting United States v.
    Harris, 
    8 F.3d 943
    , 946 (2d Cir. 1993))).          A jury could reasonably
    have concluded that Green participated in the charged conspiracy.
    See 
    Symonevich, 688 F.3d at 23
    .
    D.    The drug quantity calculation
    Green’s final claim is that the district court erred in
    calculating the drug quantity attributable to him as a result of
    his participation in the conspiracy.8         Where, as here, a district
    court’s drug quantity determination is fact-based, we review for
    clear error.   United States v. Bernier, 
    660 F.3d 543
    , 545 (1st Cir.
    2011).
    8
    As part of his original appeal, Green also challenged the
    district court’s calculation of his criminal history category,
    which included two points for a Florida state conviction for which
    Green then had an appeal pending. On July 27, 2012, after the
    conviction was affirmed on appeal, Green filed a notice of mooted
    issue with this court.
    -19-
    The presentence report (PSR), using the trial testimony
    of Carrolton and Tripp, held Green responsible for distributing at
    least 100,000 oxycodone tablets.   That amounted to 3,000 grams of
    actual oxycodone, with a marijuana equivalency of 20,100 kilograms
    and a resulting base offense level (BOL) of 36.       See U.S.S.G.
    § 2D1.1.   In his objections to the PSR and at sentencing, Green
    urged the district court to reduce the amount to 748 30-milligram
    pills and 442 80-milligram pills -- the number of pills confiscated
    from Carrolton at the Holiday Inn Express on May 7, 2009 -- which
    would have resulted in a BOL of 32.     The court found the PSR’s
    calculation to be a “reasoned approximation” and, indeed, “a
    conservative one . . . with assumptions in a couple of instances in
    the defendant’s favor.”   We agree.
    Tripp testified that he purchased between 100,000 and
    125,000 pills from Green over the course of the conspiracy.    The
    PSR used the lower number and assumed that all of those were 30-
    milligram pills, when in fact Tripp testified that Green also
    supplied 80-milligram pills.   Green claims that there were other
    suppliers, but the only other supplier referenced was “Twin,” and
    Carrolton testified that somewhere between ninety-five and ninety-
    eight percent of the pills that Tripp obtained through Carrolton
    came from Green.   We have held that a district court, in making a
    drug quantity determination, can “rely solely on the testimony of
    cooperating government witnesses, provided such testimony exhibits
    -20-
    some indicia of reliability or support from the record.”     United
    States v. Valdivia, 
    680 F.3d 33
    , 53 (1st Cir. 2012); see also
    United States v. Rivera-Calderón, 
    578 F.3d 78
    , 100 (1st Cir. 2009).
    Green has not challenged the drug quantity determination on the
    ground that his co-conspirators’ testimony lacked adequate indicia
    of reliability.   There was no clear error.   See 
    Bernier, 660 F.3d at 545
    .
    III. Conclusion
    For the foregoing reasons, we affirm.
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